警告:Establishing SSL connection without server's identity verification is not recommended

WARN: Establishing SSL connection without server's identity verification is not recommended.

 

<property name="url" value="jdbc:mysql://localhost:3306/ssm/>改为

<property name="url" value="jdbc:mysql://localhost:3306/ssm?useUnicode=true&amp;characterEncoding=utf-8&amp;useSSL=false"/>